2137445 has 8 divisors (see below), whose sum is σ = 2653560. Its totient is φ = 1650880.

The previous prime is 2137441. The next prime is 2137451. The reversal of 2137445 is 5447312.

It is a Cunningham number, because it is equal to 1462²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 770884 + 1366561 = 878^2 + 1169^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2137445 - 2² = 2137441 is a prime.

It is a super-2 number, since 2×2137445² = 9137342256050, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2137441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7226 + ... + 7515.

It is an arithmetic number, because the mean of its divisors is an integer number (331695).

2^2137445 is an apocalyptic number.

It is an amenable number.

2137445 is a deficient number, since it is larger than the sum of its proper divisors (516115).

2137445 is a wasteful number, since it uses less digits than its factorization.

2137445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14775.

The product of its digits is 3360, while the sum is 26.

The square root of 2137445 is about 1462.0003419972. Note that the first 3 decimals coincide. The cubic root of 2137445 is about 128.8145684240.

The spelling of 2137445 in words is "two million, one hundred thirty-seven thousand, four hundred forty-five".